A cobpgbation of



Patented Aug. 28, 1928.

UNETED STATES HENRY ROBERT SPENCER,

SWITCHBOARD & SUPPLY COMPANY, ILLINOIS.

TELEPHONE APPARATUS.

Application filed April 17,

My invention relates to a telephone apparatus used in connection witha-telephone system in which the well known superimposed ringingprincipal is employed for ringing or signalling .af called forsubscriber on a party telephone line without signalling the othersubscribers on said party line.

An objectoffniy invention is the provision of an alternating current;relay' whi'ch is sim'- ple and inexpensiv'e in construction andefficient in its operation." I v Another object of my invention is theutilization of my alternating current relay in the subscriberssubstation for effectively connecting the call bell of said substationin circuit with the telephone line, to which said substationisconnected, during the application of ringing current to said telephoneline, and to disconnect said call bell during the non-application ofringing current and during conversation so that no current will flowthrough saidcall bell thereby increasin the efficiency of the telephonesystem.' 'Fiach substation on the party line is provided with myalternating current relay whichrelay is associated with the call bell.Vhen ringing current is applied to the said party line each one ofsaidrelays will operate to effectively connect the associated call bellswith the telephone line and when ringing current is not applied to thesaid line the said relays will operate to disconnect the call bells fromsaid line so that no current will fiow through the coils of said callbells thereby increasing this elficiencyof the telephone system and toeffect better transmission.

The above features as well as others will be more particularly pointedout in the ensuing specification and for a clearer understanding of myinvention reference may be had to the accompanying drawing in which l kereference characters in the several views denote like parts, and inwhich;

Fig. 1 is a front elevation of the alternating current relay of myinvention:

Fig. 2 is a top View of Fig. 1;

Fig. 3 is a left side elevation of Fig' 1;

Fig. 4 is a perspective view of the armature associated with the relayof my invention; and I Fig. 5 is a perspective view of the armaturesupporting frame.

Referring now more in detail to my invention as illustrated in theaccompanying drawing it comprises a magnetiz-ible core 1924. Serial No.707,024.

1 around which is wound the usual windings 2 between the spool heads 3which are secured to the core 1, said windings 2 having connection withthe terminals 4 secured to one of the spool heads-3. A mounting brackct5 is provided withan integrally, formed ear 9 formed at right'fangles tothe said bracket 5 and provided with'an opening through which the,threaded end of the core 1 extends and a nut- 10 is provided whichhas-screw-threaded engagement vwith said threaded end of said core tosecure my re.- lay to the mounting bracket 5. i i

An armature l5 isprovided which has its end 16 reduced and provided witha pair of suitable transverse orifices 14. Asupportmg member 17 ofsuitable conducting material is provided which has a pair of integrallyformed ears 18 properly spaced to permit the insertion of the reducedend 16 of the armature 15 and a trunnion pin 19 is provided in one ofthe ears 18 and adapted to engage one of the transverse orifices 14 insaid end 16 While an adjustable screw 20 having its one end cone shapedextends through and has screw-threaded engagement with a suitably tappedorifice in the other ear 18. said cone shaped end extending into theother transverse orifice of thepair of transverse orifices 14 providedin the reduced end 16 of armature 15. The trunnion pin 19 and adjustablescrew 20 serve to pivotally support the armature between the cars 18 ofthe supporting member 17. The screw 20 is adjustable to obtain thecorrect pivotal movement of the armature 15, and a suitable lock nut 21is provided for the screw 20 for maintaining said screw 20 in itsadjusted position. A terminal 22 is integrally formed with thesupporting member 17 for receiving an external conductor. A leaf spring24 having a contact member 25 of suitable conducting material isprovided and secured to the reduced end 16 of the armature 15 bysuitable screws 26 which eX- tend through suitable openings in the saidleaf spring 2 1 and then have screw-threaded engagement with suitablytapped orifices in the armature '15. Another leaf spring 28 is providedwhich is secured near its one end to the mounting bracket 5 by suitablescrews 29, said leaf spring 28 being insulated from the. bracket 5 andscrews 29 bv suitable insulation strips 30. The end 28 of spring 28 isadapted to receive an external conducporting .rneiriber 17 is.

tor the external conductor connected to said end 28 adapted to beconnected in circuit with the external conductor connected to theterminal "22 1 when alternating 'current is flowing through winding.ofzmy relay via spring 28, contact 25 spring 24, armature 15, cars 18,member 17 and terminal The armature sup oortirl g, member 17 is securedto the mounting bracket 5 by suitable screws 323vlrich pass thpoughsuitable openings in'fthejsaid bracket It and through suitable 'penipgsin: the insulation strip 33 whichinsulates" the member 17 from thebracketfi, and then have screw-threaded .th'e 'rnotiittinji' tracker 5.

the supporting are ins'tilated by suita le b i as -T Mi i ture 1. .1 11

Y cu' d to t e mek t 5 in s unlfa position that the tree eridof the leafspring W "isldirectly over and at right angles to the 'free endofthe'lealfspring 28, the contactv member being normally out of contactliral engagement with the free'end of said leaf 'spring 28i Theenlarged end 15' of the armature 15" iso'fsuc'h ashape and weight, andthe armature 15 i's'piv'ot-a'lly snspended at such a hint, that' when,the mounting plate is in its vertical mounting position as-shown inFigs. land 2, the contact member 25 of'the leaf spring 2 4 is maintainedout of iigagement with the leaf spring 28, and the enlarged end 15' ofarmature 15 will be in alignment with only a small arcuate portionotthe'fne end of the core 1. Now when altrnatingicurrent is passingthrough the winding 2 of the coil of my relay, .the core 1 is'magnetizedand will attract the armature 15 at its enlarged end 15' and due to theattraction of the magnetized core 1 and the said enlarged end 15 notbeing in direct alignment with the center of the free end of the core 1,the armature 15 will move about its pivots between the cars 18 of themember 17 until the enlarged end 15 is in direct alignment with the freeend of the core 1, at which position the contact member 25 secured tothe leaf spring 24 will he in contactual engagement with the free endofthe leaf spring 28. My alternating current relay will remain energizedso long as alternating current is passing through its winding 2 wherebythe contact member 25 remains in contaetual engagement with the leafspring 28 to maintain a closed circuit between the terminals 28' and 22.hen current no longer flows through the winding 2 of my relay, the core1 dcmagnetizes whereupon the armature 15 restores to its normal restingposition by gravity whereby the contact member 25 disengages the leafspring 28 to open the circuit with which the relay may be associated.The center of gravity of the armature 15 while sa d armature is in itspivotally means of mountedpos'ition is such that the armature 15 willnormally rest in such position that the contact member 25 will notengage the leaf spring -28 when no current is flowing through thewinding 2.

Having described a particular (llllbOt iment of my invention asillustrated, it is to be understood that I do not wish to be limitdtdtheexact'structure as described and illustrated as changes andmodifications will ieadilysuggest the1nsclves to'those skilled in theart, but that I intcnd to cover all that which may come within the scopeand spirit of the' ap' ended claims.

What clim as new and desire to secure by UnitedStates'Letters Patent is:v

device of the class described including a magnetizable core, a windingfor said core, sai'd core and winding forming .a single mountable'unit,a mounting" bracket having an integrally formed ear, means for secur-'ng saidunit'to fsaid ear, a fpe'ndulous armature having its one endreduced and its other'end enlargei'means secured .to said mountingbracket for'pivotally supporting said armature at its reduced end andfor positioning said enlarged end in a vertical plane 'pariillel'to theaxis of said core and in operative )osition relatireto one end of saidmagnetiz lecore, said supporting means indluding'an adjustable screwadapted to adjusti'the pivotal movementvo'f the said armature and to'belocked in its adjusted position, a contact spring secured to saidarmature, a contact spring secured to said bracket,

and means "for connect'ng operating current to the winding of saidvcorcto energize said core whereby said armature is pivotally moved in a laneparallel to the face of the core of sai e'lectromagnet, to ciTect contactual engagement of said contact springs.

2. A device of the class described including an electromagnet, amounting bracket having an integrally formed ear member, means forsecuring said electromagnet on said integrally formed ear member apendulous armature having its one end reduced and its other endenlarged, means for pivotally supporting said armature upon saidmounting bracket said enlarged end being positioned in a vertical planeparrallel to the axis of said electro-magnet and in operative positionrelative to the core of said electromagnet, said supporting means including an adjustable screw adapted to adjust the pivotal movement ofthe armature and to .be locked in its adjusted positions, a contactspring secured to the reduced end of said armature, a contact springsecured to said bracket and havin one of its ends in operative positionrelative to said first contact spring, said elcctromagnet operable toattract said enlarged end of said armature to move the same in a planeparallel to the face of the core of said electromagnet to rcontactualengagcmen cause said contact springs to make contactual engagement whenoperating current is flowing through said electromagnet, said enlargedend of said armature also adapted to restore said contact springs todiscontinue the contactual engagement of said'contact springs.

3. An alternating current relay of the class described including anelectromagnet, a mounting member, for supporting said electromagnct, apendulous armature p'ivotally supported in a vertical'plane parallel tothe axis of said electromagnet and in operative position relative to thecore'of said electr magnet by means including an adjustable screwadapted to adjust'the pivotal movement of said armatureand be lockedin'its adjusted position, a pair o' f'contact springsnormallydisengaging each other, on'e of said contact springs securedto-said armature and the other of said pairsecured saidmountingmember,fmeans for energizing saidelec tromagnet to operate said armatureand move the same in a plane parallel toithe'face of the core of saidelectromagnet to cause said Contact springs to engage each other toclose a circuit through said contact springs, said armature operable bygravity to discontinue the engagement of saidcontact springs to open thecircuit through said contact springs and pivotally balanced in itsnormal position to maintain said contact springs out of 4 A device ofthe class described including an electromagnet, a mounting member, meansfor securing said electromagnet to said mounting-member, a pendulousarmature having a contact spring-secured thereto pivotally supported ina vertical plane parallel to the axis of said electromagnet and inoperative relation of the core of said electroinagnct by means includinganadju stable screw adapted to adjust 'the pivotal movement of saidarmature and to be locked in its adjusted position, another contactSpring secured to said mounting plate, said armature adapted to beoperated by said electromagnet to move the'same in a plane parallel tothe face of the core of said electromagnet to effect contactualengagement of sa d contact springs to close a circuit through saidcontact springs and operable by gravity to discontinue the contactualengagement of said contact springs to open the circuit through saidcontact springs. A

5. A device of the class described including an electromagnet, amounting member having an inte -ally and right angularly formed ear,means for securing said electromagnet to said ear so that saidelectromagnet is parallel to said mounting member, a contact springsecured. to said mounting plate member and having its one end adapted toreceive aconductor, a pendulous armature having a contact spring securedtos its one end, means including an adjustable screw adapted to adjustthe pivotal movement of said armature'and to be locked in its adjustedposition secured to said mounting member for pivotally supporting'andpositioning said armature upon said mounting member so that the' otherend of said armature is positioned in a' vertical plane parallel to theaxis of the core of said electromagnetand-in operative position with thecore of said electromagnet and its contact spring in operative positionrelative to said first contact spring, ing a normally balanced positionso that said 'contaet springs do not engage each otherfbut adapted toassume a" osition' to effect c'ontactual engagement 0 springs when 'saidelec tromagnet' is ener gi zed to cause said armature 'to' move in aplane parallel to the; face of the core of said electromagnet'to "effectsaid contaetual engagement." f6. An'alternat-ing current relay of theclass described" includin an electromagnet, a supporting member orsupporting said electromagnet, a contact spring secured tosaid'supporting member-fa pendulous armature having a contact springsecured thereto, means for pivotally supporting said armature in avertical plane parallel to the axis of the core of said electromagnetand in operative'position relative to the said 'core of saidelectromagnet, said means including an adjustable screw adapted toadjust the pivotal' movement of the armature and to be locked initsadjusted position, said armature operable by said electroma'gnet'to movesaid armature in a plane parallel to the face of the core of saidelectromagnet to'efl'ect conta'ctual engagement of said contact springsand operable by gravity to discontinue the contactual engagement of saidcontact springs when said electromagnet is decnerg'zed.

7. A device of the class described including a mounting member having anentegrally formed right angular car, an electromagnet secured to saidear and parallel to said mounting member, a contact spring secured tosaid mountin member parallel to said electromagnet, a pendulous armaturehaving a contact spring secured to its one end, means including anadjustable screw adapted to adjust the pivotal movement of the armatureand to be locked in its adjusted position for pivotally supporting saidarmature in a vertical plane parallel to the axis of the core of saidelectromagnetand in operative position relat ve to said electromagnetand said second contact spring in operative position and at right anglesto said first'contact spring, said armature having its other end shapedand of such weight that said armature is normally balanced in aidsupporting means in such a position .said armature havsaid contact thatsaid contact springs are out of engagemcnt and also adapted to be movedin a plane parallel to the face of the core of said clcctromagnct whensaid electromagnet is energized to effect contactual engagement of saidcontact springs to close a circuit through said springs.

8. A device of the class described including a mounting member, anelectromagnet secured thereon, a contact spring secured on said mountingmember and parallel to said electromagnet, a pendulous armature having acontact spring secured to its one end, supporting means includinganad'ustable screw adapted to adjust the pivotal movement of thearmature and to be locked in its adjust-ed position, for pivotallysupporting said armature near its said one end, secured on said mountingmember in' such position that the said second contact spring is at rightangles to said first contact spring and the free end of said armature.liesin a vertical plane parallel to the axis ofthe core of saidelectromagnet, said free end of said armature adapted to balance saidarmature in said means so that said contact springs do not engage eachother and also a apted to be attracted by said electromagnet vto causesaid armature to move in a plane parallel to the face of the core ofsaid electromagnet to .ctl'ect contactual engagement of said contactsprings to close a circuit through said contact springs.

9. A device of the class described including a mounting member, anelectromag'net secured thereon, a. contact spring secured on saidmounting member and parallel to said electromagnct, a pendulous armaturehaving a contact spring secured to its one end, supporting means, forpivotally supporting said armature near its said one end including anadjustable screw adapted to adjust the pivotal movement of the armatureand to he locked in its adjusted positions, secured on said mountingmember in such position that the said second contact spring is at rightangles to said first contact spring and the free end of said armaturelies in a vertical plane parallel to the axis of the core of saidelectromagnet, said .free end of aid armature adapted to balance saidarmature in said means so that said contact springs do not engage eachother and adapted to be attracted by said electromagnet to cause saidarmature to movein a plane parallel to the face of the core of saidelectromagnct to etlcct contactual engagement of said contact springs toclose a circuit through said contact springs, a mounting plate, andmeans for securing said mounting member on said mounting plate in suchposition that said armature assumes a vertical position.

10. A device of the class described including a mounting member, anelectromagnet and a contact spring mounted thereon parallel to eachother, a pendulous armature having a contact spring secured thereto,means, for pivotally supporting said armature including an adjustablescrew adapted to adjust the pivotal movement of said armature and to belocked in its adjusted positions, secured to said mounting member sothat said contact springs are at right angles to each other and saidarmature lies in a vertical plane parallel to the axis of the core ofsaid electromagnet, said armaturebeing balancedvertically in saidsupporting means to normally maintain said second contact spring out ofenga ement with said first contact spr-ing and adapted to be operated bySaid electromagnet tocause said armature to move in a plane parallel tothe face of the core of said electromagnet to effect contactualengagement of said contact springs upon the encrgization of saidelectromagnet.

11. A device of the class jdescribed including a mounting member anelectromagnet and 'a contact spring mounted thereon parallel to eachother, a pendulous armature having a contact spring secured thereto,means, for pivotally supporting said armature including an adjustablescrew adapted to adjust the ivotal movement of said armature and to belocked in its adjusted positions, secured to said mounting member sothat said contact springs are at right angles to each other and saidarmature lies in a vertical plane parallel to the axis of the core ofsaid electromagnet, said armature being balanced vertically in saidsupporting means normally maintain said second contact spring out ofenga ement with first contact spring and adapte to be operated by saidelectromagnet to cause said armature to move in a plane parallel to theface of the core of said electromagnct to effect contactual engagementof said contact springs upon the energization of said electromagnet,said armature and its contact spring restoring the normal position bygravity upon the deenergization of said electromagnet to break theconnection of said contact spring.

12. A device of the class described including a mounting member, anelcctromagnct and a contact spring secured on said mounting memberparallel to each other, a pendulous armature having a contact springsecured to its one end, means including an adjustable screw adapted toadjust the piv otal movement of said armature and to be locked in itsadjusted positions for pivotally supporting said armature in a verticalplane parallel to the axis of the core of said electromagnet and inoperative position relative thereto, and its associated contact springat right angles to said first contact spring, said armature having itsfree end adapted to be attracted by said clectromagnet and move in aplane parallel to the face of the core of said electromagnet to elfectcontactual engagement of said contact springs to close a circuit throughsaid contact springs when said electromagnet energizes, and adapted torestore to normal position by gravity to effect disengagement of saidcontact springs and to maintain said contact springs out of engagementwhen said electromagnet de-energizes.

13. A device of the class described including a mounting member, anelectromagnet mounted on said mounting, member, a contact spring securedon said mounting member parallel to side elect-romagnet, a. pendulousarmature lying in a vertical lane parallel to the axis of the core ofsaid e cctromag'net and having its one end reduced and its other endenlarged, a contact spring secured to the reduced end of said armature,means, for pivotally supporting said armature at its reduced endincluding an adjustable screw adapted to adjust the pivotal movement ofsaid armature and to be locked in its adjusted positions, secured tosaid mounting member and positioned so that said second contact springis in operative position and at right angles to said first contactspring and said enlarged end is partially in alignment with a portion ofone end of the core of said electromagnet, said armature normallybalanced vertically in said supporting means to maintain said contactsprings out of engagement with each other, andsaid enlarged end adaptedto be attracted upon the energization of said electromagnet and to movein a plane parallel to the face of the core of said electromagnet intofull alignment with the end of the core of said electromagnet to effectcontactual engagement of said contact springs.

Si ned by me at Jamestown, in the county of Ciautauqua, and State ofNewYork, this 14th day of April, 1924.

HENRY ROBERT SPENCER.

